Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Data / System / Data / Common / SQLTypes / SQLInt64Storage.cs / 1 / SQLInt64Storage.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Diagnostics; using System.Globalization; using System.IO; using System.Xml.Serialization; using System.Collections; internal sealed class SqlInt64Storage : DataStorage { private SqlInt64[] values; public SqlInt64Storage(DataColumn column) : base(column, typeof(SqlInt64), SqlInt64.Null, SqlInt64.Null) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: SqlInt64 sum = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { sum += values[record];} hasData = true; } if (hasData) { return sum; } return NullValue; case AggregateType.Mean: SqlDecimal meanSum = 0; int meanCount = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { meanSum += values[record].ToSqlDecimal();} meanCount++; hasData = true; } if (hasData) { SqlInt64 mean = 0; checked {mean = (meanSum /(SqlDecimal) meanCount).ToSqlInt64();} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; SqlDouble var = (SqlDouble)0; SqlDouble prec = (SqlDouble)0; SqlDouble dsum = (SqlDouble)0; SqlDouble sqrsum = (SqlDouble)0; foreach (int record in records) { if (IsNull(record)) continue; dsum += (values[record]).ToSqlDouble(); sqrsum += (values[record]).ToSqlDouble() * (values[record]).ToSqlDouble(); count++; } if (count > 1) { var = ((SqlDouble)count * sqrsum - (dsum * dsum)); prec = var / (dsum * dsum); // we are dealing with the risk of a cancellation error // double is guaranteed only for 15 digits so a difference // with a result less than 1e-15 should be considered as zero if ((prec < 1e-15) || (var <0)) var = 0; else var = var / (count * (count -1)); if (kind == AggregateType.StDev) { return Math.Sqrt(var.Value); } return var; } return NullValue; case AggregateType.Min: SqlInt64 min = SqlInt64.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt64.LessThan(values[record], min)).IsTrue) min = values[record]; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SqlInt64 max = SqlInt64.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt64.GreaterThan(values[record], max)).IsTrue) max = values[record]; hasData = true; } if (hasData) { return max; } return NullValue; case AggregateType.First: if (records.Length > 0) { return values[records[0]]; } return null;// no data => null case AggregateType.Count: count = 0; for (int i = 0; i < records.Length; i++) { if (!IsNull(records[i])) count++; } return count; } } catch (OverflowException) { throw ExprException.Overflow(typeof(SqlInt64)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { return values[recordNo1].CompareTo(values[recordNo2]); } override public int CompareValueTo(int recordNo, Object value) { return values[recordNo].CompareTo((SqlInt64)value); } override public object ConvertValue(object value) { if (null != value) { return SqlConvert.ConvertToSqlInt64(value); } return NullValue; } override public void Copy(int recordNo1, int recordNo2) { values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { return values[record]; } override public bool IsNull(int record) { return (values[record].IsNull); } override public void Set(int record, Object value) { values[record] = SqlConvert.ConvertToSqlInt64( value); } override public void SetCapacity(int capacity) { SqlInt64[] newValues = new SqlInt64[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; } override public object ConvertXmlToObject(string s) { SqlInt64 newValue = new SqlInt64(); string tempStr =string.Concat("", s, ""); // this is done since you can give fragmet to reader, bug 98767 StringReader strReader = new StringReader(tempStr); IXmlSerializable tmp = newValue; using (XmlTextReader xmlTextReader = new XmlTextReader(strReader)) { tmp.ReadXml(xmlTextReader); } return ((SqlInt64)tmp); } override public string ConvertObjectToXml(object value) { Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); Debug.Assert((value.GetType() == typeof(SqlInt64)), "wrong input type"); StringWriter strwriter = new StringWriter(FormatProvider); using (XmlTextWriter xmlTextWriter = new XmlTextWriter (strwriter)) { ((IXmlSerializable)value).WriteXml(xmlTextWriter); } return (strwriter.ToString ()); } override protected object GetEmptyStorage(int recordCount) { return new SqlInt64[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SqlInt64[] typedStore = (SqlInt64[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SqlInt64[]) store; //SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Data.SqlTypes; using System.Diagnostics; using System.Globalization; using System.IO; using System.Xml.Serialization; using System.Collections; internal sealed class SqlInt64Storage : DataStorage { private SqlInt64[] values; public SqlInt64Storage(DataColumn column) : base(column, typeof(SqlInt64), SqlInt64.Null, SqlInt64.Null) { } override public Object Aggregate(int[] records, AggregateType kind) { bool hasData = false; try { switch (kind) { case AggregateType.Sum: SqlInt64 sum = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { sum += values[record];} hasData = true; } if (hasData) { return sum; } return NullValue; case AggregateType.Mean: SqlDecimal meanSum = 0; int meanCount = 0; foreach (int record in records) { if (IsNull(record)) continue; checked { meanSum += values[record].ToSqlDecimal();} meanCount++; hasData = true; } if (hasData) { SqlInt64 mean = 0; checked {mean = (meanSum /(SqlDecimal) meanCount).ToSqlInt64();} return mean; } return NullValue; case AggregateType.Var: case AggregateType.StDev: int count = 0; SqlDouble var = (SqlDouble)0; SqlDouble prec = (SqlDouble)0; SqlDouble dsum = (SqlDouble)0; SqlDouble sqrsum = (SqlDouble)0; foreach (int record in records) { if (IsNull(record)) continue; dsum += (values[record]).ToSqlDouble(); sqrsum += (values[record]).ToSqlDouble() * (values[record]).ToSqlDouble(); count++; } if (count > 1) { var = ((SqlDouble)count * sqrsum - (dsum * dsum)); prec = var / (dsum * dsum); // we are dealing with the risk of a cancellation error // double is guaranteed only for 15 digits so a difference // with a result less than 1e-15 should be considered as zero if ((prec < 1e-15) || (var <0)) var = 0; else var = var / (count * (count -1)); if (kind == AggregateType.StDev) { return Math.Sqrt(var.Value); } return var; } return NullValue; case AggregateType.Min: SqlInt64 min = SqlInt64.MaxValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt64.LessThan(values[record], min)).IsTrue) min = values[record]; hasData = true; } if (hasData) { return min; } return NullValue; case AggregateType.Max: SqlInt64 max = SqlInt64.MinValue; for (int i = 0; i < records.Length; i++) { int record = records[i]; if (IsNull(record)) continue; if ((SqlInt64.GreaterThan(values[record], max)).IsTrue) max = values[record]; hasData = true; } if (hasData) { return max; } return NullValue; case AggregateType.First: if (records.Length > 0) { return values[records[0]]; } return null;// no data => null case AggregateType.Count: count = 0; for (int i = 0; i < records.Length; i++) { if (!IsNull(records[i])) count++; } return count; } } catch (OverflowException) { throw ExprException.Overflow(typeof(SqlInt64)); } throw ExceptionBuilder.AggregateException(kind, DataType); } override public int Compare(int recordNo1, int recordNo2) { return values[recordNo1].CompareTo(values[recordNo2]); } override public int CompareValueTo(int recordNo, Object value) { return values[recordNo].CompareTo((SqlInt64)value); } override public object ConvertValue(object value) { if (null != value) { return SqlConvert.ConvertToSqlInt64(value); } return NullValue; } override public void Copy(int recordNo1, int recordNo2) { values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { return values[record]; } override public bool IsNull(int record) { return (values[record].IsNull); } override public void Set(int record, Object value) { values[record] = SqlConvert.ConvertToSqlInt64( value); } override public void SetCapacity(int capacity) { SqlInt64[] newValues = new SqlInt64[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; } override public object ConvertXmlToObject(string s) { SqlInt64 newValue = new SqlInt64(); string tempStr =string.Concat("", s, ""); // this is done since you can give fragmet to reader, bug 98767 StringReader strReader = new StringReader(tempStr); IXmlSerializable tmp = newValue; using (XmlTextReader xmlTextReader = new XmlTextReader(strReader)) { tmp.ReadXml(xmlTextReader); } return ((SqlInt64)tmp); } override public string ConvertObjectToXml(object value) { Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); Debug.Assert((value.GetType() == typeof(SqlInt64)), "wrong input type"); StringWriter strwriter = new StringWriter(FormatProvider); using (XmlTextWriter xmlTextWriter = new XmlTextWriter (strwriter)) { ((IXmlSerializable)value).WriteXml(xmlTextWriter); } return (strwriter.ToString ()); } override protected object GetEmptyStorage(int recordCount) { return new SqlInt64[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { SqlInt64[] typedStore = (SqlInt64[]) store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, IsNull(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (SqlInt64[]) store; //SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DrawingBrush.cs
- DataGridViewImageCell.cs
- PropertyValueUIItem.cs
- AssemblyBuilder.cs
- AutomationPropertyInfo.cs
- PopupRootAutomationPeer.cs
- DecodeHelper.cs
- MailMessageEventArgs.cs
- MailAddress.cs
- DoubleCollectionValueSerializer.cs
- StringSorter.cs
- EntitySqlQueryBuilder.cs
- XmlSortKeyAccumulator.cs
- TraceSection.cs
- BinaryParser.cs
- WindowsSlider.cs
- RequestCachePolicyConverter.cs
- CharEntityEncoderFallback.cs
- ListBox.cs
- XPathNodeHelper.cs
- ItemsChangedEventArgs.cs
- WorkflowExecutor.cs
- UIElementParagraph.cs
- SharedPersonalizationStateInfo.cs
- DataShape.cs
- OrderedDictionary.cs
- autovalidator.cs
- DefaultParameterValueAttribute.cs
- DesignerProperties.cs
- WebOperationContext.cs
- Helpers.cs
- Command.cs
- InputGestureCollection.cs
- BaseCollection.cs
- FontUnit.cs
- TextEditorSpelling.cs
- ControlCollection.cs
- TextClipboardData.cs
- ComponentDispatcher.cs
- AssemblyAssociatedContentFileAttribute.cs
- CodeBlockBuilder.cs
- DnsCache.cs
- SharedStatics.cs
- FormCollection.cs
- SafeNativeMethods.cs
- LinearGradientBrush.cs
- SqlTriggerAttribute.cs
- SQLUtility.cs
- TypeConstant.cs
- AspProxy.cs
- Pkcs7Recipient.cs
- SystemIPAddressInformation.cs
- x509utils.cs
- Baml2006ReaderFrame.cs
- SchemaMapping.cs
- ReversePositionQuery.cs
- DateTimeEditor.cs
- ConstraintConverter.cs
- GenericXmlSecurityToken.cs
- ApplicationFileCodeDomTreeGenerator.cs
- EncodingTable.cs
- ColumnResizeUndoUnit.cs
- ServicesUtilities.cs
- DebugHandleTracker.cs
- ListManagerBindingsCollection.cs
- Decoder.cs
- ConnectionStringsExpressionBuilder.cs
- TraceLevelStore.cs
- HttpProfileGroupBase.cs
- TripleDESCryptoServiceProvider.cs
- Encoding.cs
- DataGridItemCollection.cs
- HtmlInputControl.cs
- HttpModuleCollection.cs
- HttpRuntime.cs
- Knowncolors.cs
- HitTestParameters.cs
- HelloMessageApril2005.cs
- HandleValueEditor.cs
- Baml2006ReaderFrame.cs
- XmlRootAttribute.cs
- UrlUtility.cs
- SpeakInfo.cs
- DecoderFallback.cs
- InvalidProgramException.cs
- PageCatalogPart.cs
- InternalResources.cs
- TablePattern.cs
- OleDbWrapper.cs
- ActivitiesCollection.cs
- ExpressionsCollectionConverter.cs
- OpCodes.cs
- DbCommandTree.cs
- BufferedGraphicsContext.cs
- XmlSchemaCollection.cs
- ConfigurationManagerHelperFactory.cs
- SrgsToken.cs
- LabelDesigner.cs
- MissingFieldException.cs
- MatcherBuilder.cs